Workshop at the 17th International Conference April 22, 2008

Linked Data on the Web

Tim Berners-Lee, W3C/MIT Christian Bizer, Freie Universität Berlin Tom Heath, Talis Kingsley Idehen, OpenLink Software

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Documents and the Web of Data

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Documents

Analogy z a global filesystem Designed for z human consumption Primary objects z documents Links between z documents (or sub-parts of)‏ Degree of structure in objects z fairly low of content and links z implicit

Image: Darwin Bell, http://flickr.com/photos/darwinbell/,Tim CC-BY-NC Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Documents

API/ HTML HTML HTML untyped XML links untyped untyped links links

ABCD

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Documents: Issues

Simplicity - Loosely structured data, untyped links, disconnected data sets

Integration - Show me all the publications from -related conferences in 2007

Querying - Which WWW2008 papers have been written by people from companies of less than 100 people?

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Data

Analogy z a global Designed for z machines first, humans later Primary objects z things (or descriptions of things)‏ Links between z things (including documents) Degree of structure in (descriptions of) things z high Semantics of content and links z explicit

Image: Steve Jurvetson, http://www.flickr.com/people/jurvetson/,Tim Berners-Lee, CC-BY Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) The Web of Data

Thing Thing Thing Thing Thing

Thing Thing Thing Thing Thing

typed typed typed typed links links links links

A B C D E

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Principles

1. Use URIs as names for things 2. Use HTTP URIs so that people can look up those names 3. When someone looks up a URI, provide useful RDF information 4. Include RDF statements that link to other URIs so that they can discover related things

Tim Berners-Lee 2007 http://www.w3.org/DesignIssues/LinkedData.html

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: May 2007

Over 500 million RDF triples Around 120,000 RDF links between data sources

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: July 2007

NEW! NEW!

NEW!

NEW!

NEW!

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: August 2007

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: November 2007

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: February 2008

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data on the Web: April 2008

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Triple Count

More than 2 billion RDF triples Interlinked by around 3 million RDF links

(rough estimates)

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Linked Data Browsers

Tabulator Browser (MIT, USA) Disco Hyperdata Browser (FU Berlin, DE) OpenLink RDF Browser (OpenLink, UK) Zitgist RDF Browser (Zitgist, USA) Humboldt (HP Labs, UK) Fenfire (DERI, Irland) Marbles (FU Berlin, DE)

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Web of Data Search Engines

Falcons (IWS, China) Sindice (DERI, Ireland) Watson (Open University, UK) SWSE (DERI, Ireland) Swoogle (UMBC, USA) MicroSearch (Yahoo, Spain)

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008) Structure of the Day

1. Session: Populating the Web with Linked Data 8:50-10.10 10:30-12:10 2. Session: Consuming Linked Data from the Web 13:30 – 3:10 3. Session: Architecture and Conceptual 15:30 – 17:30 4. Discussion about further Research and Deployment Agenda 17:30 – 18:00

Tim Berners-Lee, Christian Bizer, Tom Heath, Kingsley Idehen: Linking Data on the Web (4/22/2008)